chr3-11017434-GGG-CGA

Variant names:

• chr3-11017434-GGG-CGA
• NM_003042.4:c.223_225delGGGinsCGA
• SLC6A1 p.Gly75Arg

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PS1_Very_Strong PM1 PM5

The NM_003042.4(SLC6A1):​c.223_225delGGGinsCGA​(p.Gly75Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G75E) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SLC6A1 NM_003042.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.78
• Publications: 0 publications found

Genes affected

SLC6A1 (HGNC:11042): (solute carrier family 6 member 1) The protein encoded by this gene is a gamma-aminobutyric acid (GABA) transporter that localizes to the plasma membrane. The encoded protein removes GABA from the synaptic cleft, restoring it to presynaptic terminals. [provided by RefSeq, Jan 2017]

SLC6A1-AS1 (HGNC:40546): (SLC6A1 antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PS1: Transcript NM_003042.4 (SLC6A1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.
• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 9 uncertain in NM_003042.4
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-11017435-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1507042.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003042.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC6A1	NM_003042.4	MANE Select	c.223_225delGGGinsCGA	p.Gly75Arg	missense	N/A	NP_003033.3
	SLC6A1	NM_001348250.2		c.223_225delGGGinsCGA	p.Gly75Arg	missense	N/A	NP_001335179.1	P30531
	SLC6A1	NM_001348251.2		c.-123+175_-123+177delGGGinsCGA		intron	N/A	NP_001335180.1	A0A2R8Y4I3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC6A1	ENST00000287766.10	TSL:1 MANE Select	c.223_225delGGGinsCGA	p.Gly75Arg	missense	N/A	ENSP00000287766.4	P30531
	SLC6A1	ENST00000698198.1		c.295_297delGGGinsCGA	p.Gly99Arg	missense	N/A	ENSP00000513602.1	A0A8V8TMZ9
	SLC6A1	ENST00000644803.1		c.223_225delGGGinsCGA	p.Gly75Arg	missense	N/A	ENSP00000494469.1	A0A2R8YDD5

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		6.8

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr3-11059120;